package collection;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

public class SortInteger {
    public static void main(String[] args) {
        Random rand=new Random();
        List<Integer> list=new ArrayList<>();
        for(int i=0;i<10;i++){
            list.add(rand.nextInt(100));
        }
        System.out.println(list);//原版

        Collections.sort(list);//从小到大排序
        System.out.println(list);//排序

        Collections.reverse(list);//反转
        System.out.println(list);
    }
}
